From: Lukasz Nowak <[email protected]>
Telit AT modem firmware (tested with UE910-EUR) generates
+CGREG: 0\r\n\r\n+CGEV: NW DETACH
after a context is de-activated and ppp connection closed.
Then, after a random amount of time (observed from a few seconds
to a few hours), an unsolicited +CGREG: 1 arrives.
Attempt to fix the problem, by sending AT+CGATT=1 once.
This does not re-activate the context, but if a network connection
is still correct, will generate an immediate +CGREG: 1.
---
drivers/atmodem/gprs.c | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/atmodem/gprs.c b/drivers/atmodem/gprs.c
index 7ea9f00..9e4c6c9 100644
--- a/drivers/atmodem/gprs.c
+++ b/drivers/atmodem/gprs.c
@@ -50,6 +50,8 @@ struct gprs_data {
GAtChat *chat;
unsigned int vendor;
unsigned int last_auto_context_id;
+ gboolean telit_try_reattach;
+ int attached;
};
static void at_cgatt_cb(gboolean ok, GAtResult *result, gpointer user_data)
@@ -73,8 +75,10 @@ static void at_gprs_set_attached(struct ofono_gprs *gprs,
int attached,
snprintf(buf, sizeof(buf), "AT+CGATT=%i", attached ? 1 : 0);
if (g_at_chat_send(gd->chat, buf, none_prefix,
- at_cgatt_cb, cbd, g_free) > 0)
+ at_cgatt_cb, cbd, g_free) > 0) {
+ gd->attached = attached;
return;
+ }
g_free(cbd);
@@ -194,6 +198,28 @@ static void cgreg_notify(GAtResult *result, gpointer
user_data)
NULL, NULL, NULL, gd->vendor) == FALSE)
return;
+ /*
+ * Telit AT modem firmware (tested with UE910-EUR) generates
+ * +CGREG: 0\r\n\r\n+CGEV: NW DETACH
+ * after a context is de-activated and ppp connection closed.
+ * Then, after a random amount of time (observed from a few seconds
+ * to a few hours), an unsolicited +CGREG: 1 arrives.
+ * Attempt to fix the problem, by sending AT+CGATT=1 once.
+ * This does not re-activate the context, but if a network connection
+ * is still correct, will generate an immediate +CGREG: 1.
+ */
+ if (gd->vendor == OFONO_VENDOR_TELIT) {
+ if (gd->attached && !status && !gd->telit_try_reattach) {
+ DBG("Trying to re-attach gprs network");
+ gd->telit_try_reattach = TRUE;
+ g_at_chat_send(gd->chat, "AT+CGATT=1", none_prefix,
+ NULL, NULL, NULL);
+ return;
+ }
+
+ gd->telit_try_reattach = FALSE;
+ }
+
ofono_gprs_status_notify(gprs, status);
}
@@ -214,6 +240,11 @@ static void cgev_notify(GAtResult *result, gpointer
user_data)
if (g_str_equal(event, "NW DETACH") ||
g_str_equal(event, "ME DETACH")) {
+ if (gd->vendor == OFONO_VENDOR_TELIT &&
+ gd->telit_try_reattach)
+ return;
+
+ gd->attached = FALSE;
ofono_gprs_detached_notify(gprs);
return;
} else if (g_str_has_prefix(event, "ME PDN ACT")) {
--
2.7.4
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